Shield



FIG. 1 is a perspective view of the shield of the present design;

FIG. 2 is a top plan view of the shield;

FIG. 3 is a right elevational view of the shield;

FIG. 4 is a left elevational view of the shield;

FIG. 5 is a rear elevational view of the shield;

FIG. 6 is a bottom plan view of the shield;

FIG. 7 is a front elevational view of the shield; and,

FIG. 8 is a fragmentary cross sectional view of the shield taken along line 8—8 of FIG. 2. 

The ornamental design for a shield, as shown and described. 